It depends I think...how far off of ideal are we talking about, even in Shawns picture you see variation but you don't see straight up and down and you don't see bat completely wrapped. As long as you are not in the extreme AND your lower body is in the correct position at the correct time I'll take it.In the grand scheme of the overall swing, how important is it?
Do you like preset some of the knob towards catcher in stance?